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Steel slag grinding aid and preparation method thereof

A grinding aid and steel slag technology, which is applied in the field of grinding aids, can solve the problems of high cost and ineffective improvement, and achieve the effects of increased compressive strength, various spatial configurations, and increased activity index

Active Publication Date: 2013-09-18
安徽海螺材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned prior art, the grinding aid with triethanolamine as the main raw material has no obvious effect on improving the activity index of steel slag, and the cost is relatively high. Therefore, it is imminent to develop a grinding aid product with strong pertinence for steel slag

Method used

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  • Steel slag grinding aid and preparation method thereof
  • Steel slag grinding aid and preparation method thereof
  • Steel slag grinding aid and preparation method thereof

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preparation example Construction

[0025] The invention discloses a preparation method of a steel slag grinding aid, which comprises the following steps:

[0026] Mix 40-70 parts by weight of organic amines containing N-H bonds, 50-70 parts by weight of aldehydes and 3-6 parts by weight of ammonia water, heat up to 90-100°C, and react to obtain alcohol amines, The organic amines containing N-H bonds are acrylamide or melamine; the alcohol amines, 50-80 parts by weight of water, 10-25 parts by weight of inorganic salts, 3-5 parts by weight of mixed alcohol and 10 ~ 15 parts by weight of sulphite pulping waste liquid are mixed and stirred to obtain a steel slag grinding aid.

[0027] In the preparation process of the above-mentioned steel slag grinding aid, the present invention first utilizes the N-H bond in acrylamide or melamine to react with aldehyde compounds to form alcohol amines. The aldehyde compound is preferably formaldehyde or acetaldehyde, so that the N—H bond reacts with formaldehyde or acetaldehyd...

Embodiment 1

[0044] Inject 70 parts by weight of acrylamide into the reactor at one time, heat it to 85°C, then uniformly add 60 parts by weight of formaldehyde solution and 3 parts by weight of ammonia water into the reactor at the same time, the feeding time is 1.5 hours, and keep warm at 100°C for 3 hour, obtain alcohol amines;

[0045] Cool the above-prepared alcohol amines to room temperature, then add 60 parts by weight of water into the reactor, and stir thoroughly to obtain an aqueous solution, then add 15 parts by weight of sodium phosphate, 5 parts by weight of mixed alcohol, waste 10 parts by weight of the solution are sequentially added into the reaction vessel, and stirred while adding, and the obtained product is the steel slag grinding aid.

Embodiment 2

[0047] Inject 50 parts by weight of acrylamide into the reactor at one time, heat it to 85°C, then add 70 parts by weight of acetaldehyde solution and 3 parts by weight of ammonia water into the reactor at the same time, the feeding time is 2 hours, and keep warm at 100°C for 3 hour, obtain alcohol amines;

[0048] Cool the above-prepared alcohol amines to room temperature, then add 50 parts by weight of water into the reactor, and stir thoroughly to obtain an aqueous solution, then add 10 parts by weight of sodium phosphate, 5 parts by weight of mixed alcohol, waste 10 parts by weight of the solution are sequentially added into the reaction vessel, and stirred while adding, and the obtained product is the steel slag grinding aid.

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Abstract

The invention discloses a preparation method of a steel slag grinding aid. The preparation method comprises the following steps: mixing an organic amine substance containing N-H bonds, an aldehyde substance and ammonia water, reacting and then getting an alcohol-amine substance, wherein the organic amine substance containing the N-H bonds is of acrylamide or melamine; and mixing the alcohol-amine substance, water, an inorganic salt, mixed alcohol and waste liquid from pulping through an sulfurous acid method to get the steel slag grinding aid. The alcohol-amine substance prepared by the preparation method disclosed by the invention has larger molecular weight and various spatial configurations, is of not only a surfactant with a dispersion function, but also an early strength agent, and can avoid the agglomeration of particles during the powder grinding process of steel slag, improve the specific surface area of the steel slag and further improve the active index of the steel slag. The alcohol-amine substance prepared by the preparation method disclosed by the invention can separate CaO from C3S and C2S, enable mineral composition to be not dense any longer and realize the effect of improving the activity of the steel slag.

Description

technical field [0001] The technical field of the grinding aid of the present invention, more specifically, relates to a steel slag grinding aid and a preparation method thereof. Background technique [0002] Steel slag is one of the main waste slags in the iron and steel industry. It is mainly composed of oxides of calcium, iron, silicon, magnesium and a small amount of aluminum, manganese, phosphorus, etc. The mineral phase is tricalcium silicate, dicalcium silicate, calcium magnesium olivine, calcium It is a solid solution formed by rhodoxene, calcium aluminum ferrite and oxides of silicon, magnesium, iron, manganese and phosphorus, and also contains a small amount of free calcium oxide, metallic iron, fluoroapatite, etc. Steel slag is a solid waste produced in large quantities by using lime to extract impurities during the steelmaking process, and its emissions account for about 10% to 15% of steel production. In recent years, the annual discharge of steel slag is close...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/14
CPCY02W30/91
Inventor 傅秀新冯恩娟赵洪义朱化雨
Owner 安徽海螺材料科技股份有限公司
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